Are VPd\u3csub\u3e3\u3c/sub\u3e and NbPd\u3csub\u3e3\u3c/sub\u3e itinerant ferromagnets?

Low-field magnetic susceptibility and high-field magnetization results are reported for polycrystalline samples of NbPd3, VPd3, and iron doped VPd3. Recent self-consistent, spin-polarized band calculations have predicted that the pure compounds are itinerant ferromagnets. Down to 1.6 K there is no evidence for either magnetic ordering or exchange enhancement in VPd3 and NbPd3. The Fe-doped alloys exhibit transitions at low temperatures to a magnetic cluster-glass state. Journal of Applied Physics is copyrighted by The American Institute of Physics

Simple vibrating sample magnetometer

Design features of a simple and relatively inexpensive homemade vibrating sample magnetometer are described. These include signal electronics which employs an analog divider rather than the usual electromechanical feedback circuit, and a method for gas cleaning during sample changes allowing long experiments at liquid helium temperatures in a superconducting solenoid. Review of Scientific Instruments is copyrighted by The American Institute of Physics

Magnetic properties of the rare-earth glasses (R\u3csub\u3e65\u3c/sub\u3eFe\u3csub\u3e35\u3c/sub\u3e)\u3csub\u3e100-x\u3c/sub\u3eB\u3csub\u3ex\u3c/sub\u3e

Results are reported on the magnetic properties of (R65Fe35)100-xBx glasses, where R denotes Y, Gd, and Er, and x is 10 or 20. Curie-Weiss fits were made to high temperature susceptibility data to determine average effective moments per magnetic ion and Weiss temperatures. Hysteresis loops and modified Arrott plots were used to determine the spontaneous magnetizations, coercive forces, and ordering temperatures. The effective moments and spontaneous moments are compared with those calculated on the assumption of local moments on both magnetic subnetworks, and assuming various spin structures. There is evidence for moment instabilities on Fe atoms in the Y-Fe-B glass, depending on local-environment effects. Local random anisotropy plays an important role in Er-Fe-B but not in Gd-Fe-B. Journal of Applied Physics is copyrighted by The American Institute of Physics